Here are several of my custom research levels that have not made it into the Journal of Reaction Engineering. More puzzles will be added as I come up with them. Feel free to post your solution stats, and I'll add them to the list of known solutions.

The levels are listed roughly in order of increasing difficulty. Warning: some of the later puzzles are wicked hard!

Tainted Milk
Melamine (http://en.wikipedia.org/wiki/Melamine), infamous for its role in the 2008 Chinese milk scandal (http://en.wikipedia.org/wiki/2008_Chinese_milk_scandal) and other protein adulteration cases.
The real life industrial process has the chemical reaction
6 HCNO -> C3H6N6 + 3 CO2
but there is nowhere for the excess CO2 to go in our reactor. Or is there?